Page 357 - Integrated Wireless Propagation Models

I n - B u i l d i n g ( P i c o c e l l ) P r e d i c t i o n M o d e l s 335

FIGURE 5.6.2.2.4 Electromagnetic field simulated using FDTD technique. (A color version of this
a
figure is av i l able at www.m h p rofessional.comjiwpm.)
Data points of FDTD, ray tracing, Lee model, and measurement of north 2nd floor
Lee
-1 00 rT-r-----------------, 1 0 0 I )',"'""'
FDTO .
"1": 30 ray tracing 90 J 1
-95 0 Lee model _/_
0 Measured data 80
E * FDTO with furniture 70
� -90 0 Rav tracina with furniture
.!: 60
£ ;R
0
Ol 0 0 0 0 0
c -851-- lL 50
Q) (') 0
0 0 0 ()
� 0 � 0 g o 40
§, -80 0
Ui 30
� * �
0 -- 30 ray tracing
-75 0 Lee model
* -- FDTO with furniture
Ray tracing with furniture
5 1 0 1 5 20
Point number Deviation n dB
i
i
FIGURE 5.6.2.3.1 3D ray trac n g and FDTD models versus the Lee model. (A color version of this
figure is available at www.mhprofessional.comjiwpm.)
5. 7 Summary and Conclusions
Different models for in-building (picocell) predictions are discussed in this chapter. In
dense urban areas, the interference between all different sizes at a cell site is difficult to
predict and manage. Propagation in in-building scenarios is especially complicated and
unexpected. Every building has its own structured characteristics with different materi­
als and layouts and different surroundings.